Hiccup could only stare in slack-jawed, abject horror when Goliath's hand had been ripped off of his body. While they hadn't talked in a while, he liked Goliath, and more than that, the sight of someone else losing a limb had a much more personal impact for him than it might have had for some other people.

After the Kessek forced Goliath to the ground, Hiccup's horrified expression faded to one of single-minded resolve and he darted forward. To some, it might have looked like he was trying to make a possibly ill-advised attempt to attack the Kessek.

What he was really doing was making a beeline for Goliath's severed hand. The ship could probably reattach it, right? He wanted to try to see if he could keep it from getting even more damaged and get it to Medbay to be preserved long enough that they might have a chance of fixing it.